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Railways Sample Paper RRBs Assistant Loco Pilot and Technician CBT STAGE-I Sample Paper-16

  • question_answer
    If one root of the equation\[{{x}^{2}}-6kx+5,=0\]is 5. Then, the value of k is

    A)  2        

    B)  1      

    C) \[-1\]    

    D) \[-\frac{1}{2}\]

    Correct Answer: B

    Solution :

    5 is a root of equation \[\,{{x}^{2}}-6kx+5=0\] \[\Rightarrow \]\[{{(5)}^{2}}-6\times k\times 5+5=0\] \[\Rightarrow \]   \[30\,\,k=30\Rightarrow k=1\]


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